Objectives. To describe the prevalence of internal derangement of the
temporomandibular joint (TMJ) in subjects from a population
representative cross-sectional study through the distribution of
frequency of the data obtained from MRI findings.
Material and methods. 114 subjects with at least one sign of temporomandibular disorders (tender- ness/pain on palpation of the joints or muscles, TMJ sounds, pain or deviation during maximum mouth opening (active/passive)) and 193 controls underwent MRI after proper history taking and assessment of clinical symptoms.
Results. 464 joints with no disk displacement (NDD), 114 joints with reducible displaced disk (RDD), and 36 joints with permanently displaced disk (PDD) were confirmed on magnetic resonance imaging (MRI). Pathological TMJ states such as partially and medially disk displacement with complete reposi- tion and retroplaced condyle were the most frequent forms of the internal derangement of the temporo- mandibular joint.
Conclusion. The results of this study confirm the concept that musculoskeletal abnormality may not be related to patients’ symptoms.
Material and methods. 114 subjects with at least one sign of temporomandibular disorders (tender- ness/pain on palpation of the joints or muscles, TMJ sounds, pain or deviation during maximum mouth opening (active/passive)) and 193 controls underwent MRI after proper history taking and assessment of clinical symptoms.
Results. 464 joints with no disk displacement (NDD), 114 joints with reducible displaced disk (RDD), and 36 joints with permanently displaced disk (PDD) were confirmed on magnetic resonance imaging (MRI). Pathological TMJ states such as partially and medially disk displacement with complete reposi- tion and retroplaced condyle were the most frequent forms of the internal derangement of the temporo- mandibular joint.
Conclusion. The results of this study confirm the concept that musculoskeletal abnormality may not be related to patients’ symptoms.
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